Commit226211f

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Optimization for bpcharlen, textlen, varcharlen in case of single byte

encodings.

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+17

-18

lines changed

+17

-18

lines changed

Lines changed: 9 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -8,7 +8,7 @@`
`8`	`8`	`*`
`9`	`9`	`*`
`10`	`10`	`* IDENTIFICATION`
`11`		`- * $Header: /cvsroot/pgsql/src/backend/utils/adt/varchar.c,v 1.86 2001/11/08 04:05:13 tgl Exp $`
	`11`	`+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/varchar.c,v 1.87 2001/11/18 12:07:07 ishii Exp $`
`12`	`12`	`*`
`13`	`13`	`*-------------------------------------------------------------------------`
`14`	`14`	`*/`
`@@ -598,6 +598,10 @@ bpcharlen(PG_FUNCTION_ARGS)`
`598`	`598`	`BpChar*arg=PG_GETARG_BPCHAR_P(0);`
`599`	`599`
`600`	`600`	`#ifdefMULTIBYTE`
	`601`	`+/* optimization for single byte encoding */`
	`602`	`+if (pg_database_encoding_max_length() <=1)`
	`603`	`+PG_RETURN_INT32(VARSIZE(arg)-VARHDRSZ);`
	`604`	`+`
`601`	`605`	`PG_RETURN_INT32(`
`602`	`606`	`pg_mbstrlen_with_len(VARDATA(arg),VARSIZE(arg)-VARHDRSZ)`
`603`	`607`	`);`
`@@ -806,6 +810,10 @@ varcharlen(PG_FUNCTION_ARGS)`
`806`	`810`	`VarChar*arg=PG_GETARG_VARCHAR_P(0);`
`807`	`811`
`808`	`812`	`#ifdefMULTIBYTE`
	`813`	`+/* optimization for single byte encoding */`
	`814`	`+if (pg_database_encoding_max_length() <=1)`
	`815`	`+PG_RETURN_INT32(VARSIZE(arg)-VARHDRSZ);`
	`816`	`+`
`809`	`817`	`PG_RETURN_INT32(`
`810`	`818`	`pg_mbstrlen_with_len(VARDATA(arg),VARSIZE(arg)-VARHDRSZ)`
`811`	`819`	`);`

Lines changed: 8 additions & 17 deletions

Original file line number	Diff line number	Diff line change
`@@ -8,7 +8,7 @@`
`8`	`8`	`*`
`9`	`9`	`*`
`10`	`10`	`* IDENTIFICATION`
`11`		`- * $Header: /cvsroot/pgsql/src/backend/utils/adt/varlena.c,v 1.74 2001/10/25 05:49:46 momjian Exp $`
	`11`	`+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/varlena.c,v 1.75 2001/11/18 12:07:07 ishii Exp $`
`12`	`12`	`*`
`13`	`13`	`*-------------------------------------------------------------------------`
`14`	`14`	`*/`
`@@ -240,22 +240,13 @@ textlen(PG_FUNCTION_ARGS)`
`240`	`240`	`text*t=PG_GETARG_TEXT_P(0);`
`241`	`241`
`242`	`242`	`#ifdefMULTIBYTE`
`243`		`-unsignedchar*s;`
`244`		`-intlen,`
`245`		`-l,`
`246`		`-wl;`
`247`		`-`
`248`		`-len=0;`
`249`		`-s=VARDATA(t);`
`250`		`-l=VARSIZE(t)-VARHDRSZ;`
`251`		`-while (l>0)`
`252`		`-{`
`253`		`-wl=pg_mblen(s);`
`254`		`-l-=wl;`
`255`		`-s+=wl;`
`256`		`-len++;`
`257`		`-}`
`258`		`-PG_RETURN_INT32(len);`
	`243`	`+/* optimization for single byte encoding */`
	`244`	`+if (pg_database_encoding_max_length() <=1)`
	`245`	`+PG_RETURN_INT32(VARSIZE(t)-VARHDRSZ);`
	`246`	`+`
	`247`	`+PG_RETURN_INT32(`
	`248`	`+pg_mbstrlen_with_len(VARDATA(t),VARSIZE(t)-VARHDRSZ)`
	`249`	`+);`
`259`	`250`	`#else`
`260`	`251`	`PG_RETURN_INT32(VARSIZE(t)-VARHDRSZ);`
`261`	`252`	`#endif`

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